The Spider Drones are the second base defense unit you acquire with with the Rally Flag. It is a potent anti-vehicle unit that attacks in melee range, but can quickly cover great distances when it attacks by jumping into their target. It does moderate damage and have moderate hitpoints to allow it to survive against tanks. It is highly effective against all vehicles except Stealth Tanks. It does poorly against infantry type units such as Rangers, and cannot attack air units at all.